Abstract: A parallelogram link mechanism of a bicycle derailleur has a coil spring tensioned from a first axis of the parallelogram to another axis thereof that is diametrically opposed to the first axis. The coil spring exerts a primary spring force against the rider-supplied derailleur actuation force throughout the actuation range of the derailleur. A secondary member exerts a secondary force throughout a portion of the actuation range of the derailleur, producing a substantially constant resultant actuation force experienced by the rider. The secondary member can take various forms, including an abutment member which selectively abuts the coil spring at an angle to the spring axis; a second spring internal to the first; a member which is attached to spaced-apart coils of the coil spring to limit their linear expansion; and an internal member which limits constriction of a segment of the coil spring inwardly toward the spring axis.

Abstract: A lockable chain winder for opening and closing windows has an internal mechanism which includes a stop member (16) which can be moved to engage with the chain winder sprocket (15) in such a manner that the sprocket (15) can freely rotate on one direction, but not in the other direction.

Abstract: An emergency hydraulic control is provided for a transmission-dependent change of the hydraulic fluid pressures in a first and second hydraulic conical disk axial displacement of a continuously variable transmission, wherein a pump supplies at least the piston chamber of a second axial displacement, and a downstream-connected remote-controlled differential pressure regulator and at least one electro-magnetically actuable pressure relief valve limits the fluid pressure there, and feed from this supply the piston chamber of a first axial displacement, as well as a remote control having an opening function leading to the valve via the remote-control line, via a continuous way valve, whose opening movement into the flow-through position is controlled with the aid of the pressure present upstream of the valve, wherein at least the individual driving states such as forward running, reverse running and idling, can be selected by means of appropriate switching positions of an manual switching valve; and in case of an

Abstract: A unidirectional roller chain sprocket for use primarily in automotive engine chain drive applications which incorporates an asymmetrical tooth for improved noise reduction. The sprocket includes a first plurality of sprocket teeth each having a first engaging flank with a first contact point at which a roller contacts the first engaging flank, and a second plurality of sprocket teeth each having a second engaging flank with a second contact point at which a roller contacts the second engaging flank. The first engaging flanks include a flank flat which facilitates spacing the first contact point on the first engaging flank relative to the second contact point on the second engaging flank to effect a time delay between an initial roller to first sprocket tooth contact and an initial roller to second sprocket tooth contact. The flank flat is tangent to an engaging flank radius and a first root radius.

Abstract: A positively controlled raising cylinder raising machine, having a plurality of raising cylinders, circumferentially arranged on a rotary framework, a toothed driving belt for driving the raising cylinders being engaged with a portion of the toothed circular periphery of the raising cylinder, said toothed driving belt being driven by a transmission toothed pulley arranged around a central portion of a circumference defined by the circular periphery of the raising cylinders and operatively coupled to a driving motor, the raising cylinder driving belt being moreover engaged with a pair of switching pulleys holding the driving belt tensioned, the switching pulleys being arranged inside the circular periphery of the raising cylinders on opposite sides of said transmission toothed pulley and near the transmission toothed pulley.

Abstract: A split sprocket assembly. The sprocket assembly does not require additional separate fasteners and extends substantially parallel to the axis of the drive shaft. Further, the sprocket assembly includes first and second sprocket sections having integrally formed connecting device to connect the sprocket members about the shaft. The connecting device preferably includes a projection formed on one sprocket section and a complementary recess formed on the other sprocket section. The geometry of the projection and the recess is preferably that of a dove-tail shape. The connecting device further includes a device for preventing axial movement of the sprocket sections relative to one another. In one embodiment, the sprocket assembly does not require any additional separate fasteners at all, and the preventing device includes locking members to provide a cylindrical snap fit.

Abstract: A volumetric feed control apparatus for a build material element such as a filament used in a three-dimensional modeling machine having an application tip includes a pair of feed rollers feeding the filament to the application tip, and a sensor or sensor system feeding information to a central processing unit that continuously computes the effective cross section of the filament using the signals received from the sensor or sensor system. The central processing unit controls the speed of a DC servo or stepper motor which in turn rotates the feed rollers to advance the filament toward the application tip of the modeling machine. The central processing unit adjusts the speed of the feed rollers to supply a constant flow rate of material to the application tip. Alternatively, the sensor system can be incorporated into the feed rollers, eliminating the need for further space constraints.

Abstract: To provide a tensioner lever having a shoe made of resin is molded to prevent distortion of the shoe and increase the precision of shape and reduce the power loss caused by the abrasion of the shoe surface by friction with the chain. A tensioner lever (1) in which a shoe (3) made of resin in sliding contact with a chain is secured to a lever base (2) made of metal having a proximal end (2A) is supported rotatably about a pivotal axis so that an extreme end (2B) can be pivoted, wherein a portion of the shoe (3) having a large wall-thickness is formed with cored-out portions (3F, 3H) whereby when the shoe is molded, the resin for material thereof uniformly flows within a mold, a curing speed of the whole shoe (3) is made uniform, and distortion when molding is prevented to enhance the shape precision of the shoe (3) and the mounting precision to the lever base (2).

Abstract: A belt tension adjusting device provided on a scanner transmission belt to adjust the tension of the transmission belt, includes a helical spring that helps maintain the tension of the transmission belt, a retaining post for fixing the position of the helical spring, and a toothed recess for connecting the scanner to the transmission belt.

Abstract: A film conveying apparatus includes a conveying mechanism and a speed control mechanism. The conveying mechanism includes a plurality of lower rollers arranged in a lateral direction perpendicular to a film conveyed direction. The lower roller is equipped with a motor to variably control its speed. A plurality of upper rollers is disposed to correspond to the lower rollers so as to sandwich the continuous film with the lower rollers. The roller-speed control mechanism controls a rotation speed of each lower roller so that the film is conveyed at a desired speed in a desired direction.

Abstract: A continuously variable speed transmission has two adjustable sheaves and an endless chain or belt which is trained over and transmits torque between the sheaves. One of the sheaves can be driven by a prime mover, and the other sheave can drive a torque receiving device. Each sheave has a shaft, a first flange which is fixed to the shaft, and a second flange which is movable axially of the shaft toward and away from the first flange. The shaft portion between the flanges of at least one of the sheaves is located in the path of one or more sprays of a cooling and/or lubricating fluid which flows axially of the shaft and along the confronting conical surfaces of the flanges. The spray or sprays are supplied by the nozzle(s) of a conduit which receives fluid from a pump in the hydraulic system of the transmission.

Abstract: A continuously variable transmission of an automotive vehicle comprises a primary pulley disposed on a power input shaft, and a secondary pulley disposed on a power output shaft. Each of the primary and secondary pulleys includes a fixed wheel counterpart having a first sheave surface, and a movable wheel counterpart having a second sheave surface. The first and second sheave surfaces face each other to form a pulley groove whose width is changeable with axial movement of the movable wheel counterpart. An endless belt is wound on the primary pulley and the secondary pulley so that the secondary pulley is drivably connected to the primary pulley. The belt includes a steel belt portion, and a plurality of steel elements supported on the steel belt portion and aligned along the steel belt portion. The respective steel elements are engageable in the pulley grooves of the primary pulley and the secondary pulley.

Abstract: The invention permits stacking of seals without possibility of the sticking of their synthetic rubber seal members to one another. Moreover, when assembling the seals to produce anti-friction bearings, the invention permits storing the seals as a stack in a stocker of an automatic assembler and, unlike the case of using silicon or like prior art anti-sticking material, substantially eliminates generation of fine particles or the like adversely affecting precision apparatuses and deteriorating the reliability thereof. In an anti-friction bearing comprising an inner ring (1), an outer ring (2), and rolling elements (3) provided between the inner and outer rings, a side gap between the inner and outer rings is closed by seals (4) of the invention, which each include a synthetic rubber seal member (6) and a surface active material (7) coated thereon.

Abstract: A gas actuated derailleur for a bicycle includes a base member, a movable member supporting a chain guide, a coupling mechanism coupling the base member to the movable member so that the movable member moves relative to the base member, and an actuation mechanism responsive to compressed gas for causing the movable member to move relative to the base member.

Abstract: An auto tensioner comprising a support shaft whose one end is fixed to a target attaching object and which has an arm support portion, an arm whose one end is rotatably supported by the arm support portion of the arm and which has a pulley support portion projecting fowardly and axially beyond the top end of the support shaft, a tension pulley which is rotatably supported by the pulley support portion of the arm and arranged at a position offset from the support shaft and a friction plate arranged between one end of the arm and the arm support portion of the support shaft and adapted to apply a rotary resistance to the arm. Further, the friction plate is provided with a load bearing member in its zone where a load resulting from the offset arrangement of the tension pulley is applied whereby the zone of the friction plate can have a sufficient degree of load-resistant property.

Abstract: A hydraulic chain tensioner has a fluid leakage passageway along the outside of the piston surface that has a variable cross-section. The tensioner has a tapered or stepped geometry in either the bore of the tensioner or in the piston or both the bore and the piston. Due to the unique geometry, friction is reduced, flow leakage is controlled, and the wear of the tensioner is improved.

Abstract: A belt driving device in which an endless belt is spanned around a drive pulley and a driven pulley and the belt is driven by rotation of the drive pulley includes a belt shift correcting member for correcting shifting of the endless belt.

Abstract: A toothed belt drive or chain drive has at least one toothed gear wheel and at least one toothed belt or chain. At least one tooth of the toothed gear wheel and/or at least one tooth of the toothed belt or at least one link of the chain has a flank geometry which is different from that of each of the other teeth.

Abstract: A continuously variable transmission for an automotive vehicle comprises a drive pulley including axially first and second wheel counterparts which define therebetween a pulley groove. The first wheel counterpart of the drive pulley is axially movable under an axial thrust to decrease the width of the pulley groove. A driven pulley is provided including first and second wheel counterparts which define therebetween a pulley groove. The first wheel counterpart of the driven pulley is axially movable under an axial thrust to decrease the width of the pulley groove. An annular belt is passed on the drive and driven pulleys to drivingly connect the drive and driven pulleys. The belt is fitted in the pulley groove of each pulley, and includes a plurality of elements which are aligned along periphery of the belt. A control unit variably controls the width of the pulley groove in accordance with a transmission ratio based on an operating condition of the vehicle, and sets the axial thrust (Q) so that a value of (Q.

Abstract: A chain tension relieving device which prevents excessive tension being applied to a tension run of a chain. A shoe (5C) engages a tension run (3B) of a chain (3) stretched between a driving sprocket (1) and a driven sprocket (2) from another side of the chain in a bowed portion of the chain (3). When the tension acting on the tension run (3B) is of a prescribed value or less, the shoe surface of the shoe (5C) is held to a given advanced position so as to bow the tension run of the chain (3) by a biasing force of mechanical tensioner (15D). When the tension exceeds the prescribed value, the tension side (3B) of the chain (3) is straightened against the biasing force of the mechanical tensioner and the shoe surface of the shoe (5C) retreats from the given advanced position.